How to unit test this

mapform.js

$.fn.inFieldLabels = function() {}
$.fn.map_control = function() {}
$(document).ready(function() {
  new MapForm();
});

(function() {
  window.MapForm = function() {
    $(document).ready(this.initialize);   
  };
  window.MapForm.prototype = {
    initialize: function() {
      $('#map-searchform .searchform-fields label').inFieldLabels();
      $('#map-searchform').submit(this.handleFormSubmit);
    },
    handleFormSubmit: function(e) {
      e.preventDefault();
      $('#map').map_control().find($('#map-search-terms').val());
    }
  }
})();

mapform_spec.js

describe('a map form', function() {
  var subject;
  describe('instantiation', function() {
    beforeEach(function() {
      spyOn($.fn, 'ready').andCallFake(function() {
        expect(this).toEqual($(document))
      });
      subject = new MapForm();
    });
    it('registers a dom ready call for its initialize function', function() {
      expect($.fn.ready).toHaveBeenCalledWith(subject.initialize);
    });
  });
  describe('initializing', function() {
    beforeEach(function() {
      spyOn($.fn,'inFieldLabels').andCallFake(function() {
        expect(this).toEqual($('#map-searchform .searchform-fields label'))
      });
      spyOn($.fn,'submit');
      subject.initialize();
    });
    it('activates the inFieldLabels on the map search form', function() {
      expect($.fn.inFieldLabels).toHaveBeenCalled();
    });
    it('binds the map form submit handler to the submit', function() {
      expect($.fn.submit).toHaveBeenCalledWith(subject.handleFormSubmit);
    });
  });
  describe('submitting the map form', function() {
    var e;
    var map_control = jasmine.createSpyObj('MapControl',['find']);
    beforeEach(function() {
      spyOn($.fn, 'val').andReturn(1);
      spyOn($.fn, 'map_control').andReturn(map_control);
      e = jasmine.createSpyObj('Event',['preventDefault']);
      subject.handleFormSubmit(e)
      
    });
    it('prevents default', function() {
      expect(e.preventDefault).toHaveBeenCalled();
    });
    it('finds based upon the map search terms', function() {
      expect(map_control.find).toHaveBeenCalledWith(1);
    });
  });

});